Practicing exercise during the day is an excellent way to help you get a better night's sleep, since exercising outdoors exposes you to natural light, which helps promote sleep. Regular exercise can help reduce the risk of diseases such as sleep apnea, also help you sleep longer and improve sleep quality, since it allows you to feel more rested.
Based on the information provided within the question it can be said that in this scenario her attitude best illustrates one of the consequences of individualism. This is a concept that deals with the importance of taking care of one-self and the belief that every individual is unique and self-reliant. Therefore the main importance is distinguishing one-self as uniquely different from every one else.